I have an appraisal assignment of a three-story residential home in a central Florida community. The local municipality resurfaced and altered the grade of the street which resulted in continuous flooding of a portion of the subject property’s yard, driveway and whole first floor of the home which includes a garage, two bedrooms, bathroom and a den. This has been ongoing for several years.
Recently, a local judge ruled that the local municipality has taken a permanent drainage easement from the subject property which includes not only exterior areas of the property but also the entire first floor of the home.
Interviews of local real estate agents have confirmed that given the circumstances with repeated flooding and a permanent drainage easement encumbering part of the property and the entire first floor of the home, the home is not marketable. In addition, there is no way for the homeowner to correct the problem based on detailed engineering analysis.
A diagram of the area of the home layout is shown below with the drainage easement indicated with blue crosshatch lines. It is not possible to assemble the lot with any adjoining owner and, as a result, the drainage easement creates a u-shaped unbuildable lot.
View attachment 107885
Mathematically, when considering demolition costs of the home and the unbuildability/sellability of the lot as vacant, the resulting valuation results in a negative value if demolition costs are deducted from the nominal lot value that remains.
Is it possible to have a negative value? I know this has been discussed on this forum and other places but wanted to get the groups opinion.